Abstract
A probability density function (PDF) based combustion modeling approach for RANS is used in the simulation of a jet issuing into a hot and diluted coflow. A tabulated chemistry based model, i.e. Flamelet Generated Manifold (FGM), is adopted in the PDF method. The manifolds are constructed using igniting counter-flow diffusion flamelets with different coflow composition. To handle the inhomogeneity of the coflow and the entrainment of the ambient air, a second mixture fraction is defined to quantify the mixing of a representative coflow composition with the ambient air. The chemistry is then parameterized as a function of two mixture fractions and a reaction progress variable. Two flames, namely HM1 and HM3, having different oxygen mass concentration in the hot coflow, 3% and 9% O2 respectively, have been simulated for Reynolds number (Re) =10000. The mean oxygen concentration and temperature profiles are well predicted showing the capability of the tabulated chemistry. Profiles of mean mixture fraction and major species are also accurately captured by the model.
Original language | English |
---|---|
Title of host publication | Proceedings of the 5th International Conference on Computational Methods for Thermal Problems (THERMACOMP 2018) |
Editors | N. Massarotti, P. Nithiarasu, P. Dutta, C. Ranganayakulu |
Place of Publication | Dalian, China |
Publisher | Dalian University of Technology |
Pages | 164-167 |
Publication status | Published - 2018 |
Event | THERMACOMP 2018: 5th International Conference on Computational Methods for Thermal Problems - Bengaluru, India Duration: 9 Jul 2018 → 11 Jul 2018 |
Conference
Conference | THERMACOMP 2018: 5th International Conference on Computational Methods for Thermal Problems |
---|---|
Country/Territory | India |
City | Bengaluru |
Period | 9/07/18 → 11/07/18 |
Keywords
- FGM
- Hybrid RANS/PDF
- Jet-in-Hot-Coflow